def __init__(self, fo, radio):
N = radio.iqdatalength
S = radio.sampleRate
self.ones = np.array([1.0e-3] * N, np.complex64)
if isinstance(fo, list):
self.tones = list(map(lambda f: FrequencyShift(f, S, N), fo))
else:
self.tones = [FrequencyShift(fo, S, N)]
def setup(self, radio):
self.updateTunning(radio)
sr = self.config.out_sr
bw = self.config.bandwidth
fp = bw / sr
fs = 2 * fp
self.lp_filter = IIRFilter(fp, fs, np.complex64)
self.shift = FrequencyShift(bw / 2, sr, radio.iqdatalength)
self.config.fstart = 0
self.config.fend = bw
def setup(self, radio):
self.updateTunning(radio)
self.config.in_sr, self.resampler = makeFilterChain(
radio.sampleRate, self.n_audio * radio.audio_sr)
tmp = FrequencyShift(19000, self.config.in_sr, radio.iqdatalength)
self.kh19 = tmp.filter
self.kh38 = (self.kh19.conj())**2
self.deemphasis_a = DeemphasisFilter(self.config.in_sr)
self.deemphasis_b = DeemphasisFilter(self.config.in_sr)
self.exit_decimation_a = Decimator(self.n_audio)
self.exit_decimation_b = Decimator(self.n_audio)
self.config.out_sr = self.config.in_sr / self.n_audio
self.config.fstart = -self.config.in_sr / 2
self.config.fend = self.config.in_sr / 2
def updateConfig(self, change, radio):
if change.spectrum.length:
self.config.length = change.spectrum.length
self.power = np.zeros(self.config.length, np.float32)
self.iqbuffer = np.zeros(0, np.complex64)
self.count = 0
if change.spectrum.decimation:
self.config.decimation = change.spectrum.decimation
self.decimationFilter = DecimationFilter(self.config.decimation)
self.config.displayCenter = radio.tunerFreq
self.freqShift = FrequencyShift(radio.centerFreq - radio.tunerFreq,
radio.sampleRate,
radio.iqdatalength)
self.init(radio)
def updateTunning(self, radio):
df = radio.centerFreq - radio.tunerFreq
self.tuner = FrequencyShift(df, radio.sampleRate, radio.iqdatalength)
def updateTunning(self, radio):
df = radio.centerFreq \
- radio.tunerFreq \
+ self.config.bandwidth/2 \
+ self.foff
self.tuner = FrequencyShift(df, radio.sampleRate, radio.iqdatalength)